Meter structure



April 16, 1929. A. ALLS N 1,709,773

METER STRUCTURE Filed Jan. 6, 1927 ll 6 :0 a a\ a 2 l6 W WITNESSES: l4 INVENTOR A/berf Gav/sew? 771 ATTORNEY Patented Apr. 16, 1929.

UNITEDv STATES ALBERT CALLSEN, 0F NUREMBERG, GERMANY, ASSIGNOR TO WESTINGHOUSE ELEC- TRIO & MANUFACTURING COMPANY,

A CORPORATION OF PENNSYLVANIA.

METER STRUCTURE.

Application filed January 6, 1927, Serial No. 159,455, and in Germany April 6, 1926.

My invention relates to meter structures and particularly to the field-magnet structures of induction meters.

One object of my invention is to provide a field-magnet structure that shall improve the operating characteristics of an induction meter.

Another object of my invention is to provide a single magnetic shunt for an induction meter that shall have substantially the effect of a plurality of shunts of a type heretofore employed.

A further object of my invention is to provide a shunt for an induction meter that shall be simple and durable in construction and economical in manufacture.

Heretofore, in an induction meter of a certain type employing a laminated series magnet of substantially U-shape, it has been suggested to employ two magnetic shunts in the form of stirrups each having its legs secured against the laminated magnet.

Accordingly, it is my aim to simplify the above structure and, in practicing my invention, I provide a single shunt member that is not only easier to manufacture and to assemble but has a better effect than the double shunt.

. Figure 1 of the accompanying drawings is a top plan view of a series magnet and a magnetic shunt constructed in accordance with my invention,

Figs. 2 and 3 are views taken along the lines 11-11 and 1l1l11 respectively on Fig. 1, and

Figs. 4 and 5 are respectively a top plan and an end elevational view of a modified form of the shunt member.

As shown in Figs. 1, 2 and 3, the device comprises, in general, a laminated seriesmagnet structure 1 of substantially U-shape, a shunt member 2 therefor and non-magnetic insert members 3 for disposition between the magnet structure 1 and the shunt member 2.

The magnet structure 1 is provided with a plurality of hollow rivets 5 for holding the laminations thereof together, a pair of recesses 6 for mounting the magnetic structure 1 on a metal frame structure (not shown) and recessed portions 7 in each of its pole end portions 8 for receiving the nonmagnetic inserts 3.

As shown in Figs. 1, 2 and 3, the shunt member 2, consisting of iron or other ferromagnetic metal, is preferably of simple closed loop or annular shape having oppo site end portions 10 and an aperture 11 surrounding a space between the pole end portions 8. The shunt member 2 and the nonmagnetic insert members 3 are preferably secured to the pole end portions 8 by nonmagnetic screws 12, although other suitable means may be employed.

The shunt member 2 is preferably constructed of sheet material having portions 14 and 15 in off-set substantially parallel-plane relation to the faces of the pole end portions 8.

The better action of the above described device over the double-shunt arrangement above-mentioned is assumed to be because of the fact that the flux, which is conducted past the driving disc through the shunt, traverses only half as long a. path, so that the tendency of the flux to leave the shunt core is considerably reduced.

In the device shown in Figs. 4 and 5 in which similar parts are designated by similar reference characters, the portions 15 are provided with inwardly extending projections 16 as a means for further reducing leakage of the flux lines from the shunt member.

WVhile I have shown and described particular forms of my invention, changes may be effected therein without departing from the spirit and scope thereof, as set forth in the appended claims.

I claim as my invention:

1. An imluetion-meter device comprising'a magnetizable series core structure having a pair of pole portions and a single apertured shunt member surrounding an air space between said portions.

2. An inductionaneter device comprising a magnetizable core structure having a pair of pole portions and a single apertured shunt member surrounding an air space between said portions and having perimetral portions secured to said pole portions.

3. An indiwtion-meter device comprising a magnetizablc core structure having a pair of pole portions and a single apertured shunt member surrounding an air space between said pole portions, said shunt member having portions in different planes.

4. An induction-meter device comprising a magnetizable core structure having a pair of pole portions and a single apertured shunt member surrounding an air space between said portions having portions in different planes substantially parallel to the planes of the ends of said pole portions.

5. An induction-meter device comprising a magnetizable corestructure having a pair of pole portions and a single apertured shunt member surrounding an air space between said portions having an inwardly projecting portion.

6. An induction-meter device comprising a magnetizable core structure having a pair of pole portions and a single apcrtured shunt member surrounding an air space between said portions having oppositely inwardlyprojecting portions.

- 7 An induction-meter device comprising a magnetizable core structure having a pair of pole portions and a single aprtured shunt member surrounding an air space between said portions having oppositely inwardlyprojecting portions intermediate said pole portions.

8. An induction-meter device comprising a series core structure having a pair of pole portions and a single apertured shunt member surrounding an air space between said portions having oppositely inwardly-projecting portions in ofi'set-plane relation to the remainder thereof.

In testimony whereof, I have hereunto subscribed my name at Nuremberg, this 16th day of November, 1926.

. ALBERT CALLSEN. 

